go-config-validator

To load environment variables into a Go struct, use a MustLoad() function that reads configuration values and applies defaults. It panics on startup with a clear message if required fields are missing or invalid.

The best way to prevent missing configuration runtime errors is enforcing a startup panic. Validating required environment variables and applying defaults before the service goes live ensures the application fails immediately with a clear message.

You generate a typed configuration struct by defining required fields and default values. The struct automatically reads environment variables into strongly typed fields and validates their presence to secure your service configuration.

Yes, you can apply default values to missing environment variables in Go. The configuration generation process automatically applies specified defaults during the loading phase while strictly enforcing required fields to prevent startup failures.

Your Go service panics on startup because the MustLoad() function enforces a secure startup. It intentionally halts execution with a clear error message if required environment variables are missing, preventing the microservice from running with an invalid state.